Alert archive / Maryland / Severe Thunderstorm Warnings in 2013
Severe Thunderstorm Warning 55, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 28, 2013, 4:50 PM EDT for Cecil County, Maryland. It was in force for 55 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jun 28, 2013, 4:50 PM EDT (20:50 UTC)
- Expired
- Jun 28, 2013, 5:45 PM EDT
- In force
- 55 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
County Cecil County, MD
The radar
The Dover AFB radar (KDOX), 99 km from the middle of the area, began a volume at 20:50 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 28, 2:08 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 8.8 hours before the alert went out and 148 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 34 J/kg
- Mixed-layer CIN
- -140 J/kg
- Mixed-layer LCL
- 1246 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 66 m²/s²
- 0-3 km storm-relative helicity
- 70 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
548 WUUS51 KPHI 282050 SVRPHI MDC015-282145- /O.NEW.KPHI.SV.W.0055.130628T2050Z-130628T2145Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 450 PM EDT FRI JUN 28 2013 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHERN CECIL COUNTY IN NORTHEAST MARYLAND... * UNTIL 545 PM EDT * AT 446 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM. THE STORM WAS NEAR WOODLAWN...MOVING EAST AT 25 MPH. THIS STORM IS CAPABLE OF PRODUCING DAMAGING WIND GUSTS AND HAIL. * THE SEVERE THUNDERSTORM WILL BE NEAR... FARMINGTON AROUND 455 PM EDT... BAY VIEW AND ZION AROUND 500 PM EDT... NORTH EAST AROUND 505 PM EDT... PLEASANT HILL AROUND 510 PM EDT... CHERRY HILL AND ANDORA AROUND 515 PM EDT... ELKTON AND BARKSDALE AROUND 520 PM EDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT FRIDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND SOUTHERN NEW JERSEY AND SOUTHEASTERN PENNSYLVANIA. && LAT...LON 3972 7580 3948 7579 3959 7611 3968 7611 TIME...MOT...LOC 2050Z 269DEG 22KT 3963 7605 $$ FORECASTER:JJM
2 follow-up statements
449 WWUS51 KPHI 282107 SVSPHI SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 507 PM EDT FRI JUN 28 2013 MDC015-282145- /O.CON.KPHI.SV.W.0055.000000T0000Z-130628T2145Z/ CECIL MD- 507 PM EDT FRI JUN 28 2013 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT FOR NORTHERN CECIL COUNTY... AT 502 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM. THIS STORM WAS LOCATED NEAR BAY VIEW...OR 10 MILES WEST OF NEWARK...MOVING EAST AT 35 MPH. THE SEVERE THUNDERSTORM WILL BE NEAR... BARKSDALE AND ELKTON AROUND 515 PM EDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... EXPECT STRONG WINDS IN EXCESS OF 58 MPH...INTENSE LIGHTNING...AND HEAVY RAIN. DO NOT DRIVE YOUR CAR THROUGH FLOODED ROADWAYS. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT FRIDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND SOUTHERN NEW JERSEY AND SOUTHEASTERN PENNSYLVANIA. && LAT...LON 3972 7580 3948 7579 3959 7611 3968 7611 TIME...MOT...LOC 2106Z 280DEG 32KT 3965 7590 $$ FORECASTER:JJM
372 WWUS51 KPHI 282133 SVSPHI SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 533 PM EDT FRI JUN 28 2013 MDC015-282143- /O.CAN.KPHI.SV.W.0055.000000T0000Z-130628T2145Z/ CECIL MD- 533 PM EDT FRI JUN 28 2013 ...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN CECIL COUNTY IS CANCELLED... THE STORM THAT PROMPTED THE SEVERE THUNDERSTORM WARNING HAS MOVED OUT OF THE AREA...THEREFORE THE SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT FRIDAY EVENING FOR DELAWARE AND NORTHEASTERN MARYLAND AND SOUTHERN NEW JERSEY AND SOUTHEASTERN PENNSYLVANIA. LAT...LON 3972 7580 3948 7579 3959 7611 3968 7611 TIME...MOT...LOC 2133Z 280DEG 32KT 3961 7559 $$ FORECASTER:JJM
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 28, 3:19 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 41 min |
| Jun 28, 4:20 PM EDT | Severe Thunderstorm Warning | PHI | Cecil | 55 min |
| Jun 28, 4:27 PM EDT | Tornado Warning | PHI | Cecil | 33 min |
| Jun 28, 4:47 PM EDT | Special Weather Statement | PHI | Caroline, Kent, Queen Anne's, Talbot | 73 min |
| Jun 28, 5:09 PM EDT | Flash Flood Warning | PHI | Cecil | 11 hr |
| Jun 28, 5:14 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 46 min |
| Jun 28, 6:09 PM EDT | Severe Thunderstorm Warning | PHI | Caroline | 96 min |
Nearby
Severe Thunderstorm Warnings in Maryland, 2013Every severe thunderstorm warning in 2013
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.